What is Intermittent Fasting?

You probably heard about Intermittent Fasting. There are plenty of celebrities who swear by it (so it must be good… maybe not!). Intermittent fasting are popular search terms on Google since 2012. This post is a brief overview of the types of intermittent fasting. Other detailed posts to come soon.

What is Intermittent Fasting?

It’s an intermittent energy restriction as opposed to a continuous restriction of energy (calories/kilojoules). This means people following this diet restrict their intake sometimes instead of all the time.

It is becoming popular because it may be easier for people to restrict their intake based on time and frequency instead of having to restrict the overall amount of food they eat.​

Types of Intermittent Fasting

There is a lot of research on the 5:2 diet. This type of intermittent fasting is two consecutive or non-consecutive days of fasting and no restrictions on the other five days. The fasting days are not real fasting, it is usually a reduced intake to approximatively 25% of energy requirements (so a restriction of 75% compared to regular intake).​

The other popular way of doing intermittent fasting is the 16:8 diet. This type of fasting restricts the eating window. In this case, eating is allowed for only 8 hours (for example from 10 am to 6 pm) and there is no intake for the other 16 hours (fasting).

There is also some type of periodic fasting, for example, one week on and one week off, the Muslim Ramadan or catholic lent. ​There are many other variations to the 5:2 diet (for example 4 fasting days per week) or to the 16:8 diet (for example 4 hours eating window per day).​

A future post about intermittent fasting will report what research shows about its effectiveness for weight loss. Follow our blog via email to be notified.

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